Thanks a lot for your responses. I stopped using sesame right away (and suddenly didn't feel so sore). I had some Udo's Blend left so I used that up, and it was great. My baby started sleeping through the night. I'd do anything for that! (Besides leave her to cry in another room.) When the Udo's ran out, I switched to rice bran oil (not organic), and now I'm just doing it on faith, because I don't notice anything, plus my daughter's up all night again. So I think I'll switch back to Udo's next trip to the store for another experiment.
Thank you again for getting back to me and for the support.
And.. my baby's 19 months; my other daughter's 15. Interesting perspective!